"Mugel" is a german funny word. It means "Mensch"GER+ "Kugel"GER="Mugel" . You can call fat boys "Mugel". They are half human and half ball :P .In german this clause: "Halb Mensch halb Kugel...dasist eine Mugel" :P
Dennis is a "mugel". Because he is fat and he looks like a ball.